US Measles Cases Top 2,300 in 2026, Worst Year Since 1991

With 2,318 cases recorded, 2026 is already the worst year for US measles in over three decades.

The United States has recorded 2,318 measles cases in 2026 so far — more than in all of last year — marking the worst measles outbreak in the country since 1991. The case count has already surpassed 2025's full-year total, signaling an accelerating resurgence of a disease that was declared eliminated in the US in 2000. Dr. Jennifer Nuzzo of Brown University spoke with NPR about the drivers behind the surge and what public health officials can do to reverse the trend. The milestone figures come as health authorities track what appears to be a sustained, multi-month climb in infections rather than a contained local outbreak. Measles spreads through the air and is one of the most contagious infectious diseases known. It was largely suppressed in the US through widespread use of the MMR (measles, mumps, rubella) vaccine, but declining vaccination rates in some communities have created pockets of vulnerability that the virus is exploiting.

Why it matters

Measles can cause serious complications including pneumonia, brain damage, and death, particularly in young children and immunocompromised individuals. A resurgence of this scale — the worst in 35 years — signals that vaccination coverage in the US has eroded enough to allow sustained transmission.

What's next

Public health experts, including Dr. Nuzzo, are calling for action to reverse the trend, though the sources do not specify which interventions are imminent or being formally implemented.

Key facts

• 2,318 measles cases recorded in the US in 2026 so far
• 2026 is the worst year for measles in the US since 1991
• The 2026 case count has already exceeded the full-year total for 2025
• Measles was declared eliminated in the US in 2000
• Dr. Jennifer Nuzzo of Brown University cited the resurgence as a public health concern requiring intervention

Bias & framing notes

The Guardian provided the specific case count (2,318) and the historical context (worst since 1991), while NPR's report focused on expert analysis from Dr. Nuzzo without citing the precise figure. Neither source quoted health officials defending current vaccination policy or explaining any government response, leaving stated rationale absent. Coverage from both outlets framed the story primarily around alarm at the numbers rather than any contested policy debate.

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